Air Actuated Butterfly Valves Wafer Style. Motor Operated Valve uses an electric motor to open and close the valve. Valve positioner and fail close options available. Air Actuated Spring Return butterfly valves use air pressure to open and springs to close the valve (failsafe).

Pinch Valves vs Butterfly Valves: Silo Safety at a Pinch Here we discuss the differences of two valve types, and go into detail about Pinch Valves vs Butterfly Valves Silo over pressurisation has resulted in a number of potentially serious incidents.

Function / Operation Test: At the time of final inspection, each valve and its actuator (Flow-Control Lever / Gear / Pneumatic Actuator), under goes a complete operating test (Open/Close). This test carried out without pressure and at ambient temperature.

Sanitary Butterfly Valve. Sanitary Butterfly Valve is one of the most generally used sanitary valves in the hygiene processing nowadays. Wellgreen provides both manual and pneumatic operated butterfly valve, as well as electric actuated, manual handle can be replaced by pneumatic or electric actuator.

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Pneumatic ventilation butterfly valve is used at ventilation for chemicals, building materials, power plants, glass and other industries, or environmental engineering cold or hot air pipeline which include dust to adjust or cut-off the medium, we have lugged type, wafer type, flange type and butt-welded type at your choice, it is simple light structure with low cost.